Another small thing. Prisons are way too good. 20<> each turn per full prison? And the only drawback is if they get disconnected you end up with a tiny cluster of angry prisoners? It's twice as good as the "Creation" legendary find, which gives 20 <3 per turn, and the drawbacks (seem) very easy to mitigate.
Mechanics aside, I'd also prefer if the best room in the game wasn't an overflowing prison. The idea that you can't really build a successful dungeon without prisons... weird and feels like it's something better for RISE where you're trying to be evil.
EDIT: what about keeping prisons, and splitting the money into a seperate workshop room (which makes 5 <> per turn, or 10<> when adjacent to a full prison)?